Roller skate



June 3, 1930.

w. v. VAN ETTEN ROLLER SKATE Filed Nov. 24, 1928 [Ill/l, 1

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A TTORNEY.

Patented June 3,1930 7 1,761,807

UNITED STATES PATENT OFFICE.

I Application filed November 24, 1928. Serial No. 321,572.

My invention relates to improvements in stop screw 27. Thisscrew is secured'in a roller skates, and has for an object to provlde tapped holea near the top of guide 17- and roller skate mechanism which causes the prevents slide 16 from disengaging thereweight of the user to aid in propulsion. from when at its extended limit.

7 Another object of my improvement is to Two dependent side plates 19,19 are fasj 1 provide said mechanism of simple, durable tened to the bottom of the rear end of-base and not expensive character making it pos- 9and to the shank 20 of rack 21 to fasten said sible for the user to drive the skates in the rack to the skate frame. Gear and ratchet ordinary way quite entirely, by using his own pinion 23 is mounted loose for revolution on 51o weight entirely or by combining the usual rear axle 13 between rear'wheels 12 eni Q and the new ways of propulsion.

gagement with teeth 22 of rack 21. V V Othe'r objects of my improvement will ap- Pawls'24, 2 1 are mounted for oscillation 7 pear as the description proceeds. 011 pins 26 on rear wheels 12 to engage with I attain these and other objects of my impinion 23 when, it revolves in a direction 15 provement with the mechanism illustrated whlch will turn wheels 12 to propelthe skate in the accompanying sheet of drawings, forward, but these pawls willpass over the which form a part of this'specification, in pin on teeth under the resilient pressure of hi h Fi 1 i a id l ti f one springs 25 thereon when said pinion revolves of my skates with the weight-propelling n'the opposite direction. 1 7. -20' mechanism in place thereon, Fig. 2 is a rear The engagem nt w n k 1 an fpinview of Fig. 1, Fig. 3 is a View similar to Fig. 1 2 iS Such that When said rack moves 1 with the front end and one of the rear downward p ni 23 g ges P WISQaHd wheels and guide members broken away, Figr revolves, Wheels 12 in a direction to propel 4 is a side elevation of one of two similar theskate forwa d, Wh W i r 25 guides, Fig. v5 is an edge elevation of Fig. 4, moves upward pi i 2 r v v in P- Fig. 6 is a transverse view of Fig. 1in secposlte io a aid pawl p ss over the tion on the line aa, Fig. 7 is a side elevation e h. thereof With gaging therewith I of the toothed rack segregated, and Fig. 8 d Wh l 1 ar 11013 flecte yh up d is an edge elevation of 7. Figs. 48 are mov e of c but m y C n in .t 30 drawn on a larger l revolve 1 n a dlrection for forward propulsion Similar characters refer to similar parts When Sald Q is moving P-W Hence, i th several i C t i parts are wheels 12 not only serve as-vehicle wheels for I broken away to show'others hidden thereby. the at t are dIIViIIg Whe h reof.

With more particular reference to the des y p e mechanism. s i h wn here-i 3.3 ignated parts: The skate frame has base 9 to wlth as 'oappl e a..well-known make of which is connected front wheels 10, 10 which roller s e Which are d for fastening aremounted for revolution on front axle 11. th feet 511611861 W p not n, Axle 11 is fastened'to front bolster 14. in the usual way. When thus fastened and Rear wheels-121aremounted loose for revot f Ot i l v tednbove the gronnd' to '40 'lution on rear axle 13 the ends of which are eith r ause the 'Iear Wheels only to, be free 0 fastened to the lowerends of side guides 17, of he ground with the frontwheelsin con- 17 by being extended through holes a there- .tacttherewith or both front and rear wheels in and secured in place by nuts a". above the ground, said-rear end ofthe skate A plate15 is fastened on top of base 9 near may attain a position shown in dotted lines 45 the rear end thereof and has slides 16, 16 in Fig. ,3 where'base 911s at9, plate 15 is at 5 projecting from each end thereof and bent 15', slides 16 are at 16"andfrack 20,211isat downward atright angles .todepend there- 20', 21. i r from in engagementwith grooves 18in side Now if the downward .movement of the guides 17, 17 Each of slides 16 hasa longifoot causes wheels 12: to .contact.-with .the tudinal slot'therein with which is engaged ground and then continuestill therear end 'of 169 i r the skate is in its full-line position, rack teeth 22 have causedthe revolution of pinion 23 which, through pawls 24, has driven wheels 12 thus causing the forward propulsion of the skate by said downward foot movement.

When the foot 'is raised andfrack teeth 22 cause the pinion to revolvepin' the opposite direction, for reasons explained above, dlH/G wheels 12 are not revolved by pinion M I movement.

vThe alternate repetition oli thege 'movesaidoscillationsof said rear axle .adapted' to revolve said pinionto engage said pawls and drivesaid rear wheels forward when said rack moves downward on said pinion.

"WILLIAM vrvAN ETTEN.- ff;

ments of both feet of a skater, equipped with I my skates, will cause a nearly continuous torward propelling revolution of the driving. wheels of theskatesand the skatervwilllie driven forward hy'power which is notavail ableiwh'en ordinary roller skates are used." I

Jen

Th'e'powernsecl in propelling the driving I l wheels of my skates, conveyed by the mecha- 'nism above describedl'roomesfrom-the downa a a ward movernents of the'body of theskater and 'tlieseinovements difi'er little. fronithose j i required when using ordinaryvroller skates 1: 1 r. i thus the propelling eliortrnacle a vailableby I my"mechanism'isseeured'f'with 'littleiadldi- I tional effort on the part of the skater. i; 'yrThefoot work of tlle skater brieflylreferredeto above is thatof tl1e-usual roller .skater,ibut' propulsion eanbehadfloy using u u nay-skates anotherkind of foot movef a ,ments quite-inefieotiveto propel'theskateri 1 r; 11 V when1' Weari'n g the ordinar y roller skates. =1

By'alternately raising the heelof each foot while the weight ofthe body'is born onthe i 1 ball of'the foot the rearorheel endjofplate a f9- wi l l 'loe' earriedupwardliftingraok'21jto iitssupper-position at 21* in Fig. assuming in this case that wheelsf-, 12 reni'ain'pn the l ,-a d when the footag'ain returns to its hmmntaTPQSi-fiw h ght'of'the I heel thereof born by the ground through'the skate structure-wheels "12" have been driven l forward by the return downward ofthe ra'ck 1 and said alternate raising and" lowering of the heels will aot-to'fahnost coiitinuouslyprd:

peltheskatesdforward:',

'Plaving'thus disclosed inventihn; i v j I claim as new thereiniand 'desirefto' seeure by Letters Patentisr V p 4 r In rollerjskates, a 'skat'e fraine, a front axle fastened to sai'd skateframe, a" pair of wheels mounted for revolution onsaidjfront' axle, arear axle, guides fastened lto-saidrear azil'e, V V 7 slides fastened tosaid katiirame engaged withaid .guidesilgfor. limited-reciprocation there1n,: a-gear andratohet plnion m unted; f E loose for I'GVOlIltIOIr-DII sa1cl Irear ax-1e,-"-two f rear wheels mounted loose revolution on f f r1 X1 ..Q rres i e vis d w ii if; 1 1011 ,SPI'lIlg-pIZGSS(3d{P51328718,PIYOtBd'( lgl ea,(ill ljli I 'f'said rear wheels "to: engage witlrsaidpinion 7 only when said pinion revolves to drive:said If rear wheels iforvv art l throughisaid pawls; and I r t n d t ase a-r n m 2 90, tinuous-eng'agement with saidpinionj during r 

